Greater Greater Washington reports that Google Maps has now added Metro and Metrobus to the available travel methods you can use to figure out directions from Point A to Point B. GGW also notes that there will be a joint announcement from WMATA and Google tomorrow, and fingers are crossed that the news will be a full integration of WMATA data into Google Maps. That integration would make trip planning on Metro and Metrobus possible using the most popular web-based mapping application available (and UrbanTurf’s own favorite).

It would also mean that most of the entire DC metropolitan area’s transit services are finally incorporated into Google Maps; the Circulator, Ride On, DASH, Fairfax CUE, MTA, and MARC are already there. Which raises the question why WMATA, the regional heavyweight, is Johnny-come-lately. GGW has been tracking the process for the last couple years, and indications are that the hold-up has been at least partly due to Google and WMATA lawyers hammering out details of the arrangement.

Watch for an update tomorrow after the official announcement has been made.